luaUtils.h

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/*******************************************************************************
** Copyright (c) 2012 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/
#pragma once

#include <vrfLua/vrfLuaDefines.h>
#include "vlutil/vlString.h"

#include <lua.hpp>
#include <lauxlib.h>
#include <lualib.h>

#include <luabind/luabind.hpp>

namespace vrfLua
{
   static const char* entrySeparator = ":"; 
   static const char* objectSeparator = "|"; 

   template<class T>
   T* luaTypeCast(luabind::object const& luaObject)
   {
      try
      {
         T* value = luabind::object_cast<T*>(luaObject);
         return value;
      }
      catch (luabind::cast_failed*)
      {
         return 0;
      }
   }

   template<class T>
   T* luaTypeCastNoThrow(luabind::object const& luaObject)
   {
      boost::optional<T*> val;
      val = luabind::object_cast_nothrow<T*>(luaObject);
      if (val)
      {
         return val.get();
         //T* obj = new T(val.get());
         //return obj;
      }
      return 0;
   }

   DT_DLL_vrfLua bool DtLuaFunctionExists(lua_State* luaState, const char* functionName);

   DT_DLL_vrfLua int DtLuaErrorHandler(lua_State *L) ;
   DT_DLL_vrfLua int DtLuaErrorHandlerToString(lua_State *L);

   DT_DLL_vrfLua int DtLuaAppendPath( lua_State* L, const char* path );
   DT_DLL_vrfLua int DtLuaAppendPath( lua_State* L, const std::vector<std::string>& paths );

   DT_DLL_vrfLua void DtLuaGetPath(lua_State* L, std::vector<std::string>& paths);
}